to pink in comparison to the orange and red of G. longistyla orange to red colours. Both species were initially listed as forms of G. longistyla, but have since been separated with a specific status. Ecology Grevillea johnsonii is known to attract honeyeaters, but they do not negatively impact the growth and establishment of the shrub. The fungi Placoasterella baileyi and [[Seimatosporium grevilleae]] can cause leaf spot disease in this species. Conservation status In 2001, the total population of G. johnsonii was estimated to be well over 1,000 plants. The ROTAP conservation rating of G. johnsonii is currently 2RCi, meaning the shrub species is rare, based on the low populations of G. johnsonii in the Goulburn River area. This indicates that the species is inadequately reserved, with restricted distribution of less than 1000 over a range of 100km. Despite the current rating, collections of the species in recent years has resulted in a proposal to downgrade the ROTAP listing from 2RCi to 2RCa, indicating that the species is now adequately reserved with 1000 or more plants in a proclaimed reserve. During the 2019-2020 bushfires in southern Australia, the Wildlife and Threatened Species Bushfire Recovery Expert Panel released a "Provisional list of plants requiring urgent management intervention", with Grevillea johnsonii being mentioned as "high priority" in its conservation and recovery. It emphasised that its "fire-disease interaction" and the "cumulative exposure to high risks" required conservation action to prevent possible extinction. However, the many native plants, including G. johnsonii are capable of regenerating after fire from epicormic buds on the trunks and/or branches, from a basal lignotuber. Uses Use in horticulture Grevillea johnsonii was introduced into regular cultivation in the 1950s by Australian botanist George Althofer. The shrub species is regularly grown in Victoria in comparison to NSW, as the summer rain cannot sustain well drained soils during summer rains. If G. johnsonii is propagated outside, it is most suitable to use semi-hardwood cuttings and use acidic to neutral, well drained soil. It is important to propagate the shrub species in an area that does not maintain full sunlight exposure. If it is propagated inside, it should be grown under glass in full light, whereby liquid fertiliser must be provided monthly. Once established in the garden, the orange-flowered form tolerates a wide temperature range, including frost, and sets large numbers of seeds that germinate readily after soaking in smoked water. Grevillea 'Bon